dt-bindings: phy: qcom,qmp-usb3-dp: Add support for SC7280

Add compatible for SC7280 in QMP USB3 DP PHY bindings.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
Link: https://lore.kernel.org/r/1625576413-12324-2-git-send-email-sanm@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>